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प्रश्न
Use identities to evaluate : (97)2
बेरीज
उत्तर
(97)2
(97)2 = (100 - 3)2
We know that,
( a - b )2 = a2 + b2 - 2ab
∴ (100 - 3)2 = 1002 + 32 - 2 x 100 x 3
= 10000 + 9 - 600
= 9,409
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